Mouth film-holder.



P. P. DORR.

MOUTH FILM HOLDER.

APPLICATION FILED DEC-26.1917.

1,286,251. Patented Dec. 3, 1918.

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PHILIP P. DOBB, E FORT DOIPGE, IOWA.

MOUTH FILM-HOLDER.

. specification.

The object of this invention is to provide improved means for holding a sk1agraph film in the mouth of a subject for the purpose of receiving an impression of teeth, tooth roots, or external jaw structure above or below the line of closure.

A further object of this invention is to provide interchangeable means for holding skiagraph films interiorly of the mouth of a subject in respect of the upper and lower jaws respectively.

A further object of this invention is to provide a sanitary, easily cleaned, inexpensive and efiective device for holding a skiagraph film interiorly of the mouth of a subject.

A further object of this invention is to provide an improved detachable handle for inserting and adjusting a film holder in the mouth of a patient.

A further object of this invention is to provide improved means for holding the upper and lower teeth of the subject in properly spaced relation. 7

My invention consists inthe construction, arrangement and combination of elements hereinafter set forth, pointed out in my claims and illustrated by the accompanying drawing, in which- Figure 1 is an elevation, partly in section, showing my improved device in position for use in respect of the lower jaw of a subject. Fig. 2 is a front elevation, illustrating the detachable handle in position on the film holder. Fig. 3 is an end elevation and Fig. 4 a plan, on an enlarged scale, of the device illustrated in Fig. 1. a

Figs. 5 and 6 are end elevation and bottom plan respectively of a form of the device adapted for use in producing skiagraphs of the teeth and anterior structures of: the upper jaw, the removable handle being shown in place in the latter figure.

In the construction of the device as shown the numeral 10 designates a plate, relatively wider at the rear than at the front end, and

Specification of Letters Patent.

Application filed December 26, 1917. Serial No. 208,811.

formed with an integral roll 11 at its extremity. An offset 12 is formed on and at right angles to the rear portion of the plate 10 and is recurved at its outer margin and merged into a back plate 13 integral and parallel therewith, which back plate extends across the plane of the plate 10. A film pack 14 (shown conventionally) adapted to receive skiagraphs, is mounted in the loop, socket or space between the offset 12 and back plate 13 and may project at one or more margins beyond said back plate. The film pack 14 is employed without rubber bands or other closing devices which might, if used, cast shadows undesirable in the resulting skiagraph. The device 'may be mounted as shown in Fig. 1 with the roll 11 between the lips, the plate 10 between and engaged by the teeth, and the film pack 14 projecting downwardly at the rear of the teeth of the lower jaw. The location of the film pack relative to the teeth may be determined by engaging the plate 10 at any desired point throughout its length such as to accommodate jaws and lips of various conformation and also to accommodate various locations inasmuch as the device may be employed in any position circumferentially of the jaw. Spaced ribs 15 preferably are formed on the plate 10 between the roll 11 and oflset 12, and running at right angles to said members. It is the function of the ribs 15 to afford a roughened surface for better gripping of the plate and device by the teeth of the subject and holding the device in the desired position; and said ribs also provide for a spacing apart of the teeth of the subject to permit viewing by the operator of the position of the film pack 14, in the mouth of the subject. I also consider it advisable to provide a detachable for adjusting it in the mouth of a subject. It is to be understood. that the handle may be of any desired size, shape and con-- struction,

In the construction of the device as shown in Figs. 5 and 6 the back plate 13 is bent at 13 so that one ortion thereof occupies a plane oblique to t e remainder and also oblique to the plane of the plate 10. In like manner the film paclr. Ill is bent to accommodate it to the sloping formation of the gums and hard palate anterior to the upper row of teeth. The device as illustrated in Figs. 5 and 6 may be mounted in any desired location circumferentially of the jaw line, he held through gripping contact of the teeth and lips or either of them, and be employed to hold the film pack in such relation as properly to receive impressions or shiagraphs of exposed portions of the upper row of teeth, tooth roots and upper jaw.

The device preferably is made of sheet aluminum by stamping, bending and rolling, such substance having been found by experiment to possess sanitary characteristics in that it may be cleaned and sterilized eonveniently and without damage by immersion in suitable liquid or by subjection to heat. Thisquality is important when the promiscuous use of the device on numerous subjects is considered. The devices may be made in any desired size or in a variety of sizes and may be modified as to shape and substance of material without departing from my invention, hence I do not desire to be understood as limiting myself to the form and material shown and described.

The tube 17 of the removable handle is open at its free end, and is adapted to be caused to embrace the rolled member 11 by endwise movement, and frictionally engage said rolled member to provide a means for twisting and adjusting the device and the film pack in the mouth of the subject.

I claim as my invention 1. A film holder of the class described, comprising a member upon which the film is mounted, a coiirdinate extension adapted to be held between the teeth of a subject when the film holder is in the proper position for skiagraphing anterior objects, and a handle arranged substantially parallel with said member and engaging the forward extension and adapted to hold the same forward of saidteeth.

2. A film holder of the class described comprising a plate member adapted to be engaged by the teeth of a subject, a recurved member adapted to engage and frictionally hold a film pack, and a handle substantially parallel with the recurved member and spaced therefrom and adapted to engage the plate member.

3. A holder of the class described "formed or" a single sheet of metal and comprising a plate member adapted to be engaged by the teeth of a subject, a recurved member adapted to engage and frictionally hold a film pack, and a rolled member anterior to the plate member and adapted to be engaged by the lips of the subject.

l. A film holder of the class described formed of a single sheet of metal and comprising a plate member adapted to be engaged by the teeth of a subject, a recurved member adapted to engage and frictionally hold a film pack, and a' rolled member anterior to the plate member and adapted to be engaged by the lips of the subject, said plate member being formed with spaced ribs between said recurred member and rolled member.

5. A film holder of the class described formed of a single sheet of metal and comprising a plate member adapted to be engaged by the teeth of a. subject, a recurved member adapted to engage and lrictionally hold a film pack, and a removable handle adapted to engage and hold the forward portion of said plate member.

6. film holder oi the class described formed of a single sheet of metal and comprising a plate member adapted to be engaged by the teeth oi a subject, a recurved member adapted to engage and irietionally hold a film pack, a rolled member anterior to the plate member and adapted to be engaged by the lips of the subject, and a removable holder formed with a rolled member adapted to lrictionally engage the rolled member of said plate.

'2. A film helder out the class described having integral imperlo'rate members as fol lows; a plate, an oilset at right angles to the plate and recurved at its extremity, and a back plate parallel with and projecting beyond the ofiset.

8. In a film holder of the class described having integral members as follows: a plate, an offset at right angles to the plate and recurved'at its extremity, and a back plate parallel with and projecting beyond the offset, the projecting portion at the back plate occupying a plane oblique to the ofisetand first plate, the combination with said plate of a handle arranged substantially parallel with and spaced from said back plate and detachably secured to the forward margin of the first plate.

9. A film holder of the class described having integral members as follows :a plate, an offset at right angles to the plate and recurved at its extremity, a back plate parallel with and projecting beyond the ofiset,

till

ltlll lllll the projecting portion of the back plateoc- 325 eupying a plane oblique to the ofi'set and first plate, and a rolled plate anterior to the first plate, offset and back plate.

10. A film holder of the class described formed of a single sheet of metal and ccmits prising a plate adapted to be enga ed by the Signed by me at Fort Dodge, Iowa, this teeth of a subject, a recurve member 7th day of February, 1917. adapted to engage and frictionally hold a film pack, a rolled member anterior to the PHILIP DORE" 5 plate, and a removable handle formed with Witnesses:

a split tube adapted to embrace and friction- B. STOREY,

ally engage the rolled member of the plate. CLEO A. KERN. 

